| Year | 1930 |
| Date | 06-Mar |
| Volume | 62 |
| Issue | 1,504 |
| Page | 225 |
| Category | Electrical |
| Part | |
| Title | Modern Electrical Installation Work |
| Author | Frederick H.Taylor |
| Notes | Arrangement of circuits and their "distribution boards", making up the circuits, choosing positions for distribution boards, looping-in, the number of ways per board |